Reach for Louise's little breasts.

Continuing to taste each other’s lips and tongues, John guided his hand up from her waist to her stomach, then a little higher until he was fingering the bottom of her breast. With one quick motion, he cupped her breast, small enough that it fit in his hand.

Not yet satisfied, he quickly unzipped the hoodie he was feeling through and opened it down to her belly, exposing her chest beneath. He cupped her breast again, now able to feel the hard nipple beneath pressing against the thin fabric of her shirt. Louise moaned into his mouth as he fingered the little bud, taking a mental note that the area was a sensitive spot.

While she moaned with his touch, he was having trouble containing his own pleasure. John grinded his crotch into her hand, still pumping along his shaft and getting faster and faster with every breath they took between kissing.

When he felt the familiar building feeling begin to tip over the edge, he pulled back from his little sister's lips and met her hungry eyes.